In bryophytes, such as mosses and liverworts, the gametophyte is the dominant life phase, whereas in angiosperms and gymnosperms the sporophyte is dominant. The haploid phase is also dominant among fungi.
Which stage is dominant stage in?
The gametophyte comprises the main plant (the green moss or liverwort), while the diploid sporophyte is much smaller and is attached to the gametophyte. The haploid stage, in which a multicellular haploid gametophyte develops from a spore and produces haploid gametes, is the dominant stage in the bryophyte life cycle.
Which stage is the dominant stage in gymnosperms Brainly?
Answer: The dominant phase in the tracheophyte life cycle is the diploid (sporophyte) stage. The reproductive structures of the sporophyte (cones in gymnosperms and flowers in angiosperms), produce two different kinds of haploid spores: microspores (male) and megaspores (female).
What is the dominant phase in the life cycle of gymnosperms and angiosperms?
Answer. The adult, or sporophyte, phase is the main phase of an angiosperm’s life cycle. As with gymnosperms,angiosperms are heterosporous. Therefore, they generate microspores, which will produce pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes.
What generation is dominant in gymnosperms quizlet?
The sporophyte generation is dominant. Spores are primarily distributed by water currents. Antheridia and archegonia are produced by gametophytes. The haploid generation grows on the sporophyte generation.
What is the dominant stage in angiosperms?
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
Which stage is dominant in ferns?
In higher plants like ferns and fern allies, the sporophyte stage is dominant. Gametophytes produce gametes (sperm and eggs) in a special structure called a gametangium (-ia), while sporophytes produce spores in a special structure called a sporangium (-ia).
Which is the dominant phase of pteridophyte?
The fertilized egg or zygote undergoes the division of mitosis and forms the different parts like stems, roots, and sporophyte, and later spores are formed again through meiosis and spread by the dispersion, and, again the life cycle continues, so the sporophyte is the dominant phase of pteridophyte.
What is the dominant stage in the life cycle of a tree?
The life cycle of higher plants is dominated by the sporophyte stage, with the gametophyte borne on the sporophyte.
What is the dominant structure of gymnosperms sporophyte or gametophyte )?
In all living gymnosperm groups, the visible part of the plant body (i.e., the growing stem and branches) represents the sporophyte, or asexual, generation, rather than the gametophyte, or sexual, generation. Typically, a sporophyte has a stem with roots and leaves and bears the reproductive structures.
In which period gymnosperms were present in the form of dominant vegetation?
Section Summary. Gymnosperms are heterosporous seed plants that produce naked seeds. They appeared in the Paleozoic period and were the dominant plant life during the Mesozoic.
Which stage is the dominant stage in mosses 2 points?
Over the course of evolution, the gametophyte stage has become progressively reduced. Thus, the gametophyte stage is dominant in the more primitive (nonvascular) plants (bryophytes), whereas the sporophyte is the dominant phase in the life cycle of higher (i.e., vascular) plants.
Which generation is dominant in sporophyte?
The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte. Cells of the microsporangium within (more)
In which group of plant sporophyte is dominant phase?
In bryophytes, such as mosses and liverworts, the gametophyte is the dominant life phase, whereas in angiosperms and gymnosperms the sporophyte is dominant.
Which generation is dominant in the moss life cycle quizlet?
The gametophyte is the dominant stage of the life cycle in both mosses and ferns.
Which generation is dominant in the life cycle of a horsetail?
Like bryophytes, early vascular plants alternate generations. However, club mosses, horsetails, and ferns have a dominant sporophyte stage and a greatly reduced gametophyte stage. In each group, the familiar plant is diploid and produces sporangia (Figure below).
Which of these was the dominant plant group at the time that dinosaurs were the dominant animals?
Which of these was the dominant plant group at the time that dinosaurs were the dominant animals? Both gymnosperms and dinosaurs were dominant during the Mesozoic.
